3GPs from Apple Compressor

Were trying tp convert DV clips to 3GPs using Apple Commpressor.
The problem is we're unable to set the bit rate to constant (CBR)and our client requires this. Would anyone be able to solve this or suggest some alternative software.

That's what we thought... in that when you set the Data Rate, that should be a CBR as you've no option to select VBR or CBR. However, when a client of our looks at the 'shape' or profile of the files we supply, he says the data rate is peaking at over 128kbps (we set the rate at 80kbps) and he needs it to stay betweem 80-90kbps.

You set the combined video *and* audio rate at 80, or just the video rate?
What's the audio set at? All I can think of is that you have a high audio rate
that's raising the total, or perhaps the rate he's seeing is incorrect. That used to
be a common problem with WMVs, you'd set the rate, but it would read differently,
*and* there was also an "overhead" hit which increased the rate.
Ed